Frost King C21H Caulk Saver (3/8 in x 20 ft)

Product Description

Frost King C21H is a polyurethane foam caulk saver (backer rod) used to back caulk joints and reduce sealant volume. The rod is 3/8 inch in diameter and 20 feet long, made of resilient closed-cell foam with waterproof properties. It is compatible with most caulks and sealants and is intended for filling wide cracks, joints, foundations, and pavement gaps where a backer is required.

• Polyurethane closed-cell foam construction; waterproof and moisture-repellent.
• 3/8 in diameter x 20 ft length; sold as a single foam unit; item weight 0.5 ounces.
• Functions as a backer rod to reduce sealant use; compatible with most caulks and sealants; stays flexible between 10 and 140 degrees F.

Product Highlights

3/8 in diameter poly foam backer rod, 20 ft length, waterproof, reduces caulk usage

Product Information

Standard Information

• Brand: FROST KING
• Manufacturer Part Number: C21H
• Country of Origin: United States